Distributed Admission Control in Multiservice IP Networks: Concurrency Issues

Lima, Solange Rito; Carvalho, Paulo; Freitas, Vasco

doi:10.4304/jcm.1.3.1-9

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…The same problem holds for concurrently accepted flows in other ingress nodes. Some proposed solutions, which may lead to lower utilization, are increasing safety margins in the AC algorithms, or using some degree of over-provisioning, or a rate-based credit system controlled by egress nodes [47].…”

Section: Network Protocols and Algorithmsmentioning

confidence: 99%

A review of the architecture of admission control schemes in the Internet

Fàbrega

Jové

2013

NPA

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Admission Control (AC) is an efficient way of dealing with congestion situations in a network. Using AC, when network resources in a path are not enough for all flows (i.e., during congestion), some of the flows receive the requested service and the rest do not. Congestion situations can be reduced by increasing network resources or by optimizing their use through better routing techniques, but if congestion still occurs, AC achieves efficient use of network resources by maximizing the number of satisfied flows. However, using AC complicates the network scheme, and therefore a major concern is making the AC as simple as possible. In this paper we review the main AC schemes that have been proposed for the Internet, focusing on the simplicity of their architectures in terms of the number of nodes that participate in the AC, the required state, the use of signaling, and others.

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Section: Network Protocols and Algorithmsmentioning

confidence: 99%

A review of the architecture of admission control schemes in the Internet

Fàbrega

Jové

2013

NPA

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Admission Control for Inter-domain Real-Time Traffic Originating from Differentiated Services Stub Domains

Georgoulas

Pavlou

Trimintzios

et al. 2007

Lecture Notes in Computer Science

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An integrated bandwidth allocation and admission control framework for the support of heterogeneous real-time traffic in class-based IP networks

Georgoulas¹,

Trimintzios²,

Pavlou³

et al. 2008

Computer Communications

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The support of real-time traffic in class-based IP networks requires the reservation of resources in all the links along the end-to-end paths through appropriate queuing and forwarding mechanisms. This resource allocation should be accompanied by appropriate admission control procedures in order to guarantee that newly admitted real-time traffic flows do not cause any violation to the Quality of Service (QoS) experienced by the already established real-time traffic flows. In this paper we initially aim to highlight certain issues with respect to the areas of bandwidth allocation and admission control for the support of real-time traffic in class-based IP networks. We investigate the implications of topological placement of both the bandwidth allocation and admission control schemes. We show that the performance of bandwidth allocation and admission control schemes depends highly on the location of the employed procedures with respect to the end-users requesting the services and the various network boundaries (access, metro, core, etc.). Based on our results we conclude that the strategies for applying these schemes should be location-aware, because the performance of bandwidth allocation and admission control at different points in a class-based IP network, and for the same traffic load, can be quite different and can deviate greatly from the expected performance. Through simulations we also try to provide a quantitative view of the aforementioned deviations. Taking the implications of this "location-awareness" into account, we subsequently present a new Measurement-based Admission Control (MBAC) scheme for real-time traffic that uses measurements of aggregate bandwidth only, without keeping the state of any per-flow information. In this scheme there is no assumption made on the nature of the traffic characteristics of the real-time traffic flows, which can be of heterogeneous nature. Through simulations we show that the admission control scheme is robust with respect to traffic heterogeneity and measurement errors. We also show that our scheme compares favorably against other admission control schemes in the literature. IntroductionCurrent IP networks provide only one simple service; that is the best-effort service. Such a simple service model allows routers to be stateless and has allowed the Internet to scale well in both the size of the network and the nature of the applications. However, as the Internet evolves into a global communication infrastructure, there is a need to provide more sophisticated service models in order to support emerging services, such as Voice over IP (VoIP), Videoconference, and real-time traffic in general. Real-time traffic has QoS requirements that the current best-effort Internet cannot provide in a resource and, consequently, cost-effective manner, e.g. without massive overprovisioning.Integrated services (Intserv) was the first attempt towards supporting QoS in the Internet, but the per-flow state information that was required in all routers, both edge and core, resulted in majo...

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Distributed Admission Control in Multiservice IP Networks: Concurrency Issues

Cited by 3 publications

References 19 publications

A review of the architecture of admission control schemes in the Internet

A review of the architecture of admission control schemes in the Internet

Admission Control for Inter-domain Real-Time Traffic Originating from Differentiated Services Stub Domains

An integrated bandwidth allocation and admission control framework for the support of heterogeneous real-time traffic in class-based IP networks

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